Umm Habiba and Umm Salama mentioned about a church they had seen in Ethiopia in which there were pictures. They told the Prophet (ﷺ) about it, on which he said " If any religious man dies amongst those people they would build a place of worship at his grave and make these pictures in it. They will be the worst creature with Allâh on the Day of Resurrection." [1:419-O.B.]